Improvement in artificial-draft apparatus



V J.B'. 1 LNDBJEWS. ArtifioiaLDraft Apparatus.

Nd. 210,740. Patented Dec. 10, I878.

UNITED STATES PATENT Qrrion.

JAMES B. ANDREWS, OF NEW YORK, N. Y.

IMPROVEMENT IN ARTIFICIAL-DRAFT APPARATUS.

Specification forming part of Letters Patent No. 210,740, dated December10, 1878; application filed November 18, 1878.

To all whom it may concern:

Be it known that I, JAMES B. ANDREWS, of the city of New Yor r, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in ArtificiaLDraft Apparatus 5 and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings, making a part of thisspecification.

My invention relates to certain new and useful improvements inartificialdraft apparatus for stoves, &e.; and it has for its objecteconomy and simplicity of construction, and effectiveness in operation;and with these ends in view my invention consists of a suitable fan androtating or driving device arranged upon and within a portable frame,adapted to be readily secured in position within a straight section ofstove-pipe, as will be hereinafter more fully set forth.

In order that those skilled may understand my invention, I will proceedto describe the construction and operation of the same, referring byletters to the accompanying drawin g, in which- Figure 1 shows myimproved fan and fandriving apparatus, in elevation, within a stovepipe,which is shown in section.

A represents a section of ordinary stovepipe, within which is secured,by screws or rivets a, a light cast-iron frame, having lateral arms B,with cheek-pieces b, to receive the securing-screws a, and iorminghorizontal bearings for the shaft of amain drivinggear wheel, 0, andvertical bearings for the shaft D of the fan E. That portion of theframe designed to support the shaft of the main driving-gear is madedouble, as clearly seen at F F, Fig. 2 of the drawings, the bar F beingformed independent of the main frame and bar F, and secured in positionwith the latter by means ofscrews G Gand sleeves HH. The shaft I of themain driving gear G extends horizontally through the pipe A, and issuitably formed at its outer end to receive a crank or other device forturning the same. The vertical fan-shaft D rests at its lower end in asuitable step bearing on the frame, and is provided with a pinion-gear,K, meshing with the gear 0. The blades of the fan E are so curved andarranged that the rotation of the same will cause a draft toward thechimney.

It will be observed that the turning of the shaft I will cause a veryrapid rotation of the shaft D and fan E; and it will also be seen thatthe several parts of the fan and fan-driving apparatus are very readilymade and put together, and that the n hole device may be very quicklyand substantially secured in position within any ordinary stove-pipe.

I am aware that it is not new, broadly, to provide stove-pipes withartificialdraft apparatus, and do not wish to be understood as I yingany claim thereto; but

WVhat I claim as new, and desire to secure by Letters Patent, is

1. A cast-iron frame adapted to be secured in position within astove-pipe, and provided with horizontal and vertical bearings for theshaft of a driving-wheel and the shaft of a fan, substantially ashereinbefore set forth.

2. The frame cast separate from and adapted to receive the independentbar F, to form a double bearing for the driving-shaft, substantially asshown and described.

3. The combination and arrangement, with the pipe A, of the frame,driving-shaft, and gear 0, fan E, shaft 1), and pinion-gear K,substantially as and for the purposes hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 31st day ofOctober, 1878.

JAMES B. ANDREWS.

In presence of- Tnnononn BITTER, GEO. H. RAYMOND,

